Sungbong Park

Enhanced direct bandgap emission in germanium by micromechanical strain engineering.

Peng Huei Lim, Yasuhiko Ishikawa, Kazumi Wada, 2009, Optics express.

A monolithic integration of Ge photodiodes with Si variable optical attenuators

Koji Yamada, Yasuhiko Ishikawa, Kazumi Wada, 2009, 2009 6th IEEE International Conference on Group IV Photonics.

Monolithic integration of a silica-based arrayed waveguide grating filter and silicon variable optical attenuators based on p-i-n carrier-injection structures

Tai Tsuchizawa, Seiichi Itabashi, Rai Kou, 2010 .

Influence of carrier lifetime on performance of silicon p-i-n variable optical attenuators fabricated on submicrometer rib waveguides.

Koji Yamada, Hidetaka Nishi, Tai Tsuchizawa, 2010, Optics express.

Spectral responsivity of vertical p-i-n photodiode of selectively grown Ge on silicon-on-insulator (SOI) platform

T. Watanabe, T. Tsuchizawa, S. Itabashi, 2007, 2007 4th IEEE International Conference on Group IV Photonics.

Monolithic integration of germanium photodetectors and silicon wire waveguides with carrier injection structures

Koji Yamada, Yasuhiko Ishikawa, Kazumi Wada, 2009, 2009 Conference on Lasers and Electro-Optics and 2009 Conference on Quantum electronics and Laser Science Conference.

Monolithic integration and synchronous operation of germanium photodetectors and silicon variable optical attenuators.

Koji Yamada, Yasuhiko Ishikawa, Kazumi Wada, 2010, Optics express.